Al-Qahtani Salhah D, Al-Senani Ghadah M
Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
Carbohydr Polym. 2024 Sep 1;339:122263. doi: 10.1016/j.carbpol.2024.122263. Epub 2024 May 13.
Photochromic wood materials are very important and appealing for smart windows. Herein, we describe the development of transparent photochromic wood that can change its color under ultraviolet and visible lights. Photoluminescent transparent wood was prepared by delignification of wood followed by infiltration with a combination of gum Arabic/chitosan/acrylic acid (ACA), lanthanide-activated aluminum strontium oxide (LASO) as a photoluminescent, and Genipin as a cross-linking agent. The produced mixture was then infused into the lignin-modified wood substrate. In order to develop a luminescent colorless wood, the LASO phosphor must be well-distributed in the ACA solution without aggregation. According to the colorimetric parameters and photoluminescence spectra, this optically active wooden window switched color from transparent in daylight to green when UV-irradiated. Transmission electron microscopy (TEM) was employed to examine the morphological features of phosphor nanoparticles. The morphological features of the developed smart wooden window were investigated by scanning electron microscopy (SEM), X-ray fluorescent spectroscopy (XRF), and energy-dispersive X-ray analyzer (EDX). The mechanical performance was explored by investigating both hardness and resistance to scratches. The luminescent woods displayed an emission band at 518 nm when excited at 365 nm. The superhydrophobic performance and ultraviolet shielding of woods were improved upon increasing the phosphor content.
光致变色木质材料对于智能窗户来说非常重要且具有吸引力。在此，我们描述了一种透明光致变色木材的开发，这种木材在紫外线和可见光下会改变颜色。通过对木材进行脱木质素处理，然后用阿拉伯胶/壳聚糖/丙烯酸（ACA）、作为光致发光材料的镧系激活铝锶氧化物（LASO）以及作为交联剂的京尼平的组合进行渗透，制备了光致发光透明木材。然后将所得混合物注入木质素改性的木材基材中。为了开发出发光无色木材，LASO荧光粉必须在ACA溶液中均匀分布而不发生聚集。根据比色参数和光致发光光谱，这种光学活性木窗在日光下呈透明，在紫外线照射下变为绿色。采用透射电子显微镜（TEM）来检查荧光粉纳米颗粒的形态特征。通过扫描电子显微镜（SEM）、X射线荧光光谱仪（XRF）和能量色散X射线分析仪（EDX）对所开发的智能木窗的形态特征进行了研究。通过研究硬度和耐刮性来探索其机械性能。当在365nm激发时发光木材在518nm处显示出发射带。随着荧光粉含量的增加，木材的超疏水性能和紫外线屏蔽性能得到改善。
